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Following are some common properties, methods and utilities used in all GroupDocs.Signature for Java API examples.

Common Properties

Following are some common properties used in all examples.


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Apply License

Following code applies product license.

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Initialize, populate and return the SignatureConfig object.


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Complete Class


Introduction to GroupDocs.Signature for Java

What is Digital Signature

A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or documents. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, that the sender cannot deny having sent the message (authentication and non-repudiation), and that the message was not altered in transit (Wikipedia definition)

What is GroupDocs.Signature

GroupDocs.Signature for Java allows developers to write applications with ability to significantly sign electronic docs. Signatures can be of different types. API supports multitude of file formats. The quite captivating fact about the API is, its UI less and independent calls can be made.

Signature Types

  • Text Signature
  • Image Signature
  • Digital Signature

Supported Features

This API allows user to add multiple types of signatures, each type has its own properties. This one solution lightweight API can easily be integrated in any existing or new Java project. Learn more about GroupDocs.Signature features here.

Supported Document Formats

GroupDocs.Signature permits user to add signatures on any supported file format. The initial version of GroupDocs.Signature supports word processing documents including Microsoft Word documents, spreadsheet documents including Microsoft Excel Workbooks, presentation documents including Microsoft PowerPoint Presentations and PDF documents. More file formats will be supported in the upcoming versions.

Technical Support Channels

Product Support Forum

The main channel of the Technical Support are Product Support Forums. Post your question in the Forum and it will be answered within a few hours. Please try to report one issue per thread with all details required to reproduce the issue.

Sales and License Related Technical Queries

For sales and License related technical queries please visit the GroupDocs.Purcahse Froum. Please note that GroupDocs.Purchase is a private forum and will require you to sign up with before you can view this forum.